|This article is about a/an robo class in the Super Sentai series.|
0.5 Robo is a term coined by PLEX to refer to a team's primary robo, which is an alternate form of one of their mecha, and not a combination. It usually serves a storytelling function to slowly introduce other mecha into the story after the first few episodes. The robo later gains the ability to take on other mecha as armor.
This classification differs from one-mecha robos that simply transform into their own robo forms.